FERMILASP - Fermi LAT Monitored Source List

The Fermi LAT table of monitored sources provides daily and weekly fluxes for
sources of interest as described in
http://fermi.gsfc.nasa.gov/ssc/data/policy/LAT_Monitored_Sources.html. In
addition, similar information will be released for any source which flares
above 2x10-6 photons cm-2 s-1 until the flux drops below 2x10-7
photons cm-2 s-1. Fermi is currently in survey mode and observes the
entire sky every day. However, if a source does not exceed the detection
threshold, no entry will appear in this catalog.

The tabulated fluxes are derived at the LAT Instrument Science Operations
center in a 'quick look' analysis to produce results quickly to facilitate
follow-up multi-wavelength observations of flaring sources. The table of
released fluxes will be updated as analysis and calibrations improve.

These early flux estimates do not include systematic uncertainties and do nothave an absolute flux calibration. Use of these data as absolute flux
measurements for constraining models or for comparison to other data is
strongly discouraged at this time. In addition to overall normalization
uncertainties, source fluxes may have variations of up to 10% due to
currently-uncorrected dependencies of the gamma-ray detection efficiency on
variations of the particle background in orbit. Please note that these
results are produced using preliminary instrument response functions and
calibrations. The quality and stability of these results will improve when
updated calibrations become available over the coming months.

This database table is created by the HEASARC from FITS tables received from
the Fermi Science Support Center (FSSC). The ASP FITS files are produced by
the LAT Instrument Science Operations Center (LISOC) and transferred from the
LISOC to the FSSC about once per week.

MET_Start
This parameter is the observation start time given in Mission Elapsed Time
(MET). Mission Elapsed Time is measured in seconds from 2001.0, not including
leap seconds.

MET_End
This parameter is the observation stop time given in Mission Elapsed Time
(MET). Mission Elapsed Time is measured in seconds from 2001.0, not including
leap seconds.

Time
This parameter is the observation start time, in Universal Time (UT).

End_Time
This parameter is the observation start time, in Universal Time (UT).

Name
The designation of the source. Source names beginning with ASP are
flaring sources (i.e. included in the table
because the flux exceeded a threshold of 2x10-6 photons cm-2 s-1).

RA
The right ascension of the source. For cataloged sources, these are the
cataloged values from an appropriate catalog.
For new sources (names which begin with ASP), the RA is the value determined
by the automated source detection and localization software and may have
significant uncertainty.

Dec
The declination of the source. For cataloged sources, these are the
cataloged values from an appropriate catalog. For new sources (names which
begin with ASP), the Dec is the value determined by the automated source
detection and localization software and may have significant uncertainty.

LII
This parameter is the Galactic Longitude, as derived from the source right
ascension and declination.

BII
This parameter is the Galactic Latitude, as derived from the source right
ascension and declination.

Flux_1_300_GeV_Limit
Upper limit flag for the 1-300 GeV band flux. The flag value is "<" (a
"less than" symbol) if the flux is a 90%-confidence limit upper limit.

Flux_1_300_GeV
This parameter is the flux in the 1-300 GeV band, in photons/s/cm2, or the
90%-confidence limit flux if the limit flag is "<".

Flux_1_300_GeV_Error
This parameter is the 1-sigma uncertainty in the 1-300 GeV band flux. If the
limit flag is "<", then the flux given is the 90% upper limit and the error flag
can be ignored. If an upper limit, the value in the error column is the formal
error estimate obtained from the best fit.

Flux_300_1000_MeV_Limit
Upper limit flag for the 300-1000 MeV band flux. The flag value is "<" (a
"less than" symbol) if the flux is a 90%-confidence limit upper limit.

Flux_300_1000_MeV
This parameter is the flux in the 300-1000 MeV band, in photons/s/cm2, or the
90%-confidence limit flux if the limit flag is "<".

Flux_300_1000_MeV_Error
This parameter is the 1-sigma uncertainty in the 300-1000 MeV band flux. If the
limit flag is "<", then the flux given is the 90% upper limit and the error flag
can be ignored. If an upper limit, the value in the error column is the formal
error estimate obtained from the best fit.

Flux_0p1_300_GeV_Limit
Upper limit flag for the 0.1-300 GeV band flux. The flag value is "<" (a
"less than" symbol) if the flux is a 90%-confidence limit upper limit.

Flux_0p1_300_GeV
This parameter is the flux in the 0.1-300 GeV band, in photons/s/cm2, or the
90%-confidence limit flux if the limit flag is "<".

Flux_0p1_300_GeV_Error
This parameter is the 1-sigma uncertainty in the 0.1-300 GeV band flux. If the
limit flag is "<", then the flux given is the 90% upper limit and the error flag
can be ignored. If an upper limit, the value in the error column is the formal
error estimate obtained from the best fit.